You can find the time OpenDNS takes to resolved the address by calculating the difference between the two timestamps.

Step 4: Run the same command again but replacing it with the IP Address of your local ISP’s DNS server – in my case, it is 125.22.47.125 (Airtel).

nslookup www.google.com 125.22.47.125

As you can see, the DNS server of the local ISP (Airtel) was slightly faster than OpenDNS in resolving the IP address of www.google.com – something good to know but the difference is insignificant and there are plenty of goodreasons to continue using OpenDNS.

Update: You can execute all these commands in a batch file for more accurate results.

This is based on a comment from Resolver – "I found that my ISP’s DNS server is much faster than OpenDNS… because at the moment there are only OpenDNS Server for Europe in London. I’ll wait until OpenDNS Server are in Germany."